2 Simultaneous_music-iterator.cc -- implement Simultaneous_music_iterator
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "translator-group.hh"
11 #include "simultaneous-music-iterator.hh"
12 #include "music-list.hh"
13 #include "context-def.hh"
16 Simultaneous_music_iterator::Simultaneous_music_iterator ()
18 separate_contexts_b_ = false;
19 children_list_ = SCM_EOL;
22 Simultaneous_music_iterator::Simultaneous_music_iterator (Simultaneous_music_iterator const& src)
23 : Music_iterator (src)
26 = src.separate_contexts_b_;
27 children_list_ = SCM_EOL;
29 SCM children_list = SCM_EOL;
30 SCM *tail = &children_list;
31 for (SCM s = src.children_list_; gh_pair_p (s); s = gh_cdr(s))
33 Music_iterator *i = unsmob_iterator (gh_car (s));
34 SCM cl = i->clone ()->self_scm();
35 *tail = scm_cons (cl, *tail);
36 tail = SCM_CDRLOC (*tail);
37 scm_gc_unprotect_object (cl);
40 children_list_ = children_list;
41 scm_remember_upto_here_1 (children_list);
45 Simultaneous_music_iterator::derived_mark()const
47 scm_gc_mark (children_list_);
51 Simultaneous_music_iterator::derived_substitute(Translator_group*f,Translator_group*t)
53 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
54 unsmob_iterator (gh_car (s))-> substitute_outlet (f,t);
58 Simultaneous_music_iterator::construct_children ()
62 SCM i = get_music ()->get_mus_property ("elements");
64 children_list_ = SCM_EOL;
65 SCM * tail = &children_list_;
66 for (; gh_pair_p (i); i = ly_cdr (i), j++)
68 Music *mus = unsmob_music (ly_car (i));
70 SCM scm_iter = get_static_get_iterator (mus);
71 Music_iterator * mi = unsmob_iterator (scm_iter);
73 /* if separate_contexts_b_ is set, create a new context with the
74 number number as name */
76 SCM name = unsmob_context_def (get_outlet ()->definition_)->get_context_name ();
77 Translator_group * t = (j && separate_contexts_b_)
78 ? get_outlet ()->find_create_translator (name, to_string (j), SCM_EOL)
84 mi->init_translator (mus, t);
85 mi->construct_children ();
89 *tail = scm_cons (scm_iter, *tail);
90 tail = SCM_CDRLOC (*tail);
93 mi->set_translator (0);
98 Simultaneous_music_iterator::process (Moment until)
100 SCM *proc = &children_list_;
101 while(gh_pair_p (*proc))
103 Music_iterator * i = unsmob_iterator (gh_car (*proc));
105 || i->pending_moment () == until)
112 *proc = gh_cdr (*proc);
116 proc = SCM_CDRLOC(*proc);
122 Simultaneous_music_iterator::pending_moment () const
125 next.set_infinite (1);
127 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
129 Music_iterator * it = unsmob_iterator (gh_car (s));
130 next = next <? it->pending_moment ();
137 Simultaneous_music_iterator::ok () const
139 bool run_always_ok = false;
140 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
142 Music_iterator * it = unsmob_iterator (gh_car (s));
143 if (!it->run_always ())
146 run_always_ok = run_always_ok || it->ok ();
148 return run_always_ok;
152 Simultaneous_music_iterator::run_always () const
154 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
156 Music_iterator * it = unsmob_iterator (gh_car (s));
157 if (it->run_always ())
164 Simultaneous_music_iterator::try_music_in_children (Music *m) const
166 Music_iterator * b=0;
167 for (SCM s = children_list_; !b && gh_pair_p (s); s = gh_cdr(s))
168 b =unsmob_iterator (gh_car (s))->try_music (m);
173 Simultaneous_music_iterator::do_quit ()
175 for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
176 unsmob_iterator (gh_car (s))->quit();
180 IMPLEMENT_CTOR_CALLBACK (Simultaneous_music_iterator);